Graphene mode-locked femtosecond Alexandrite laser

Cihan, Can; Kocabaş, Coşkun; Demırbas, Umıt; Sennaroğlu, Alphan

doi:10.1364/ol.43.003969

Cited by 33 publications

(7 citation statements)

References 37 publications

(42 reference statements)

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“…This work promotes the application of graphene and other layered materials in mode‐locked solid‐state lasers. Up to now, plenty of mode‐locked solid‐state lasers using layered materials such as graphene, TMDCs, and BP have been achieved, as shown in Table . It can be seen that these lasers have excellent performance in pulse width, repetition rate, and pulse energy, which is not inferior to similar lasers.…”

Section: Versatile Pulsed Lasers Using 2d Layered Materialsmentioning

confidence: 99%

2D Layered Materials: Synthesis, Nonlinear Optical Properties, and Device Applications

Guo

Xiao

Wang

et al. 2019

Laser & Photonics Reviews

404

197

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In recent years, 2D layered materials, including graphene, topological insulators, transition metal dichalcogenides, black phosphorus, MXenes, graphitic carbon nitride, and metal‐organic frameworks, have attracted considerable interest due to their potential applications in the fields of physics, chemistry, biology, and energy. Their rise in the field of nonlinear photonics began around 2009 and has become an important research direction. Here, the synthesis techniques, nonlinear optical properties, integration strategies, and device applications of layered materials are reviewed. In terms of nonlinear optical properties, the focus is on saturable absorption and Kerr nonlinearity. On this basis, their applications in various pulsed lasers, including fiber lasers, solid‐state lasers, waveguide lasers, and related nonlinear optical phenomenon, are summarized. In addition, novel optical devices using layered materials, such as optical modulators, optical polarizers, optical switchers, and even all‐optical device, are also involved. It is believed that the development of 2D layered materials in the field of photonics will continue to deepen, thus laying a good foundation for its practical application.

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Section: Versatile Pulsed Lasers Using 2d Layered Materialsmentioning

confidence: 99%

2D Layered Materials: Synthesis, Nonlinear Optical Properties, and Device Applications

Guo

Xiao

Wang

et al. 2019

Laser & Photonics Reviews

404

197

View full text Add to dashboard Cite

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“…Alexandrite's broad gain spectrum could potentially generate sub-20-fs pulses centered around 750 nm [43]. Mode-locking of Alexandrite using Saturable Bragg Reflectors (SBRs) [29], Kerr-lensing [30,31], and graphene saturable absorbers [32] has recently been demonstrated, resulting in generation of down to 70-fs level pulses so far [31]. • Alexandrite owns a strong and broad absorption band centered around 590 nm, that enables efficient direct diode pumping by red diodes.…”

Section: Strengths and Weaknesses Of The Alexandrite Gain Mediummentioning

confidence: 99%

Alexandrite: an attractive thin-disk laser material alternative to Yb:YAG?

Demırbas

Kärtner

2020

J. Opt. Soc. Am. B

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Yb:YAG thin-disk (TD) technology has enabled construction of laser/amplifier systems with unprecedented average/peak power levels, and became the work-horse of many scientific investigations. On the other hand, for some applications, the narrow emission bandwidth of Yb:YAG limits its potential, and search for alternative broadband TD gain media with suitable thermo-opto-mechanical parameters is ongoing. The alexandrite gain medium has a broad emission spectrum centered around 750 nm, possesses thermomechanical strength that even outperforms Yb:YAG, and owns unique spectroscopic properties enabling efficient laser operation even at elevated temperatures. In this work, we have numerically investigated the power scaling potential of continuous-wave (cw) Alexandrite lasers in TD geometry for the first time. Using a detailed laser model, we have compared the potential cw laser performance of Yb:YAG, Ti:Sapphire, Cr:LiSAF, Cr:LiCAF and Alexandrite thin disk lasers under similar conditions, and show that among the investigated transition metal doped gain media, Alexandrite is the best alternative to Yb:YAG in power scaling studies at room temperature. Our analysis further demonstrates that potentially Ti:Sapphire is also a good alternative TD material, but only at cryogenic temperatures. However, in comparison with Yb:YAG, the achievable laser gain is relatively low for both Alexandrite and Ti:Sapphire, which then requires usage of low-loss cavities with small output coupling, for efficient continuous-wave operation.

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“…Over the last decade, the advancement of higher brightness laser and light-emitting diodes in the red spectral region, generated a renewed interest towards Alexandrite [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25] and continuous-wave laser output powers above 25 W have already been achieved from compact diode-pumped systems [12]. Mode-locking of Alexandrite using Saturable Bragg Reflectors (SBRs) [26], Kerr-lensing [27,28], and graphene saturable absorbers [29] has also been demonstrated recently. Unlike simple laser systems such as Yb:YAG, Alexandrite has a complex energy level diagram ( Fig.…”

Section: Introductionmentioning

confidence: 99%

“…As a more specific example, over the last years, several groups have been working on the development of ultrashort pulse Alexandrite laser systems [26][27][28][29], which resulted in the generation of down to 70-fs long pulses with average output powers in the multi-mW to multi-100 mW range. Unfortunately, mode-locking is only demonstrated in systems pumped by complex green laser sources so far.…”

Section: Introductionmentioning

confidence: 99%

Temperature dependence of Alexandrite effective emission cross section and small signal gain over the 25-450 °C range

Demırbas¹,

Sennaroğlu²,

Kärtner³

2019

Opt. Mater. Express

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We present detailed measurements of effective emission cross section spectra of the Alexandrite gain medium in the 25-450°C temperature range and provide analytic formulas that can be used to match the measured spectra. The measurement results have been used to investigate the wavelength and temperature dependence of small signal gain, as well as gain bandwidth relevant for ultrafast pulse generation/amplification. We show that the estimated laser performance based on the measured spectroscopic data provides a good fit to the results in the literature. We further discuss the need for a detailed measurement of excited-state absorption cross section in future studies.

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Graphene mode-locked femtosecond Alexandrite laser

Cited by 33 publications

References 37 publications

2D Layered Materials: Synthesis, Nonlinear Optical Properties, and Device Applications

2D Layered Materials: Synthesis, Nonlinear Optical Properties, and Device Applications

Alexandrite: an attractive thin-disk laser material alternative to Yb:YAG?

Temperature dependence of Alexandrite effective emission cross section and small signal gain over the 25-450 °C range

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